If you’re having problems logging into a character already inside Jita, or are trying to jump through a gate, sometimes the 1000 player limit won’t let you.
There are some ways to get around this though 😀
If you’re entering from a gate
You don’t have to find an alternative route as suggested, just keep tapping the gate itself and ‘jump’ - I’ve been able to get into Jita like this a few times now without issue.
Here’s what the Perimeter gate looked like as I was making my way in:
If you’re logging into a character already in Jita
When you try and log into a character already docked/in space inside the Jita system, it will give you a list of options for nearby systems to be ‘relocated’ to:
Just close that window and select your character from the login screen again - it might not work first time but eventually you’ll find a slot and be logged into your Jita character.